Vertically And Horizontally Polarized Omnidirectional Antennas And Related Methods
a polarized omnidirectional antenna, vertical and horizontal technology, applied in the direction of antennas, polarised antenna unit combinations, antenna details, etc., can solve the problems of omni-directional applications, high compromise, and inability to provide uniform omni-directional coverage of antennas,
Active Publication Date: 2015-04-30
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Benefits of technology
The present invention is about solving the problems of receiving and transmitting electromagnetic waves using dual polarized, omni-directional antenna modules that have orthogonal first and second linear polarizations. The antenna elements have arrangements that prevent interference between their patterns. An omni-directional antenna module may provide 360-degree coverage and eliminate nulls below the antenna by arranging the antenna elements in parallel with the orthogonal axes of a three-dimensional Cartesian coordinate system and aligning the centers of the elements vertically to avoid interference between the radiation patterns of the dipoles. The technical effects of the invention are improved signal quality and reliable communication coverage in all directions.
Problems solved by technology
A problem with conventional ±45° polarized panel antennas used in small cell applications is that the −45° and +45° directions vary around the antenna, and orthogonality, is highly compromised at certain angles.
This is a significant disadvantage in small cell applications where many users may be expected to be directly below the antenna.
Method used
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[0018]Throughout the following description and drawings, like reference numbers / characters refer to like elements. It should be understood that, although specific exemplary embodiments are discussed herein there is no intent to limit the scope of present invention to such embodiments. To the contrary, it should be understood that the exemplary embodiments discussed herein are for illustrative purposes, and that modified and alternative embodiments may be implemented without departing from the scope of the present invention.
[0019]Referring to FIGS. 1(A), 1(B), and 2, there is depicted an omni-directional antenna module 1 that comprises a plurality of vertically and horizontally polarized antenna elements arranged in parallel with respective orthogonal axes of a three-dimensional Cartesian coordinate system. The centers of the individual antenna elements are arranged collinearly along the vertical or “Z” axis so that the radiation patterns of the individual orthogonally polarized dipo...
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An omni-directional antenna module includes a plurality of vertically and horizontally polarized antenna elements arranged to provide 360° coverage around an antenna, and to eliminate nulls below the antenna. The antenna elements are arranged in parallel with respective orthogonal axes of a three-dimensional Cartesian coordinate system, with the centers of the antenna elements being arranged collinearly along the vertical or “Z” axis so that the radiation patterns of the individual orthogonally polarized dipoles do not interfere.
Description
INTRODUCTION[0001]Base stations used in small cell, cellular mobile radio networks and applications may include antennas that cover a few streets or blocks. In such applications it is important to minimize the visual impact of the antenna, while still providing full 360° coverage with minimal nulls.[0002]Current dual polarized omni antennas used in such base stations are usually quasi-omnis, which means that there are three ±45° polarized panel antennas in a single canister. Each panel covers a 120° sector, thus providing 360° coverage.[0003]A problem with conventional ±45° polarized panel antennas used in small cell applications is that the −45° and +45° directions vary around the antenna, and orthogonality, is highly compromised at certain angles. In addition, both polarization patterns have deep nulls directly below the antenna. This is a significant disadvantage in small cell applications where many users may be expected to be directly below the antenna.[0004]While ±45° polarize...
Claims
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Login to View More IPC IPC(8): H01Q21/24
CPCH01Q21/24H01Q1/246H01Q21/08
Inventor POWELL, CHARLES M.HUNT, WARREN F.
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD